CALVIN, Cynthia (Knecht) Of Lexington, February 27, 2013. Beloved wife of Charles N. Calvin. Loving mother of James N. and his wife Dar of Singapore, Keith C. and his wife Luciana of Chelmsford, Paige A. Calvin of Brookline and Jane L. Calvin and her husband Jonathan Bollen of Westford. Cherished grandmother of Eliza, Samuel, Silas, Isaac, James, Mook and Wan. Dear sister of James H. Knecht of CA. A celebration of life will be held at the Follen Community Church, 755 Mass. Ave., Lexington on Sunday, March 3 at 2 p.m. Relatives and friends are kindly invited to attend. In lieu of flowers donations in Cynthia's memory may be made to Breast Cancer Research Fund or Patient Programs Fund, c/o Dr. Erban, Tufts Cancer Center, 800 Washington St., Boston, MA 02111. Interment will be private.